1 Should see two green squares if object-tag data=dataURL MIME types are case-insensitive.
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3 <img width=
"200" height=
"200" src=
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVQIHWNg+M8AAAICAQDpLOrTAAAAAElFTkSuQmCC"></object>
4 <img width=
"200" height=
"200" src=
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVQIHWNg+M8AAAICAQDpLOrTAAAAAElFTkSuQmCC"></object>